Passing $POST values using JQuery Ajax Problem....

I am new to JQuery. I wanna passing my values to another page using Jquery by clicking on 2nd button instead on submit button. I tried echo what values it carried to another page (a.php) and I got, "[object HTMLInputElement]". There's no values on a.php page. I got "array(0) { } " when i print_r[$_POST] on it. Cant somebody tell me what wrong with my code? Sorry for my english.